Cytochalasin B is a cell-permeable mycotoxin binding to the barbed end of actin filaments, inhibits the enlongation and shortening of actin filaments, with Kds of 2.2 nM and 1.4 nM for F-actin in the presence of MgCl2 (2 mM) or MgCl2 (2 mM) plus KCl, respectively. Cytochalasin B (6 μM) increases the myofibrillar fragmentation index (MFI), which is attributed to the intensely breaking of myofibrillar proteins into short segments. Cytochalasin B also accelerates the disruption of actin filaments.
In vivo, Cytochalasin B (10, 25, 50 mg/kg, i.p.) dose-dependently increases the life expectancy of Balb/c mice bearing with P388/ADR leukemias. Cytochalasin B at 50 mg/kg produces 10 % long-term survival in the multidrug resistant P388/ADR cohort, and 40 % long-term survival in the drug sensitive P388/S cohort.
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||DMSO 10 mM|
The effect of Cytochalasin B and Jasplakinolide on depolymerization of actin filaments in goose muscles during postmortem conditioning.
Zhou C, et al. Food Res Int. 2016 Dec;90:1-7. PMID: 29195861.
Cytochalasin B may shorten actin filaments by a mechanism independent of barbed end capping.
Theodoropoulos PA, et al. Biochem Pharmacol. 1994 May 18;47(10):1875-81. PMID: 8204105.
S107 is a Type 1 ryanodine receptor (RyR1) stabilizer.
3,3’,5,5’-Tetramethylbenzidine(TMB) is a chromogenic substrate used in staining procedures in immunohistochemistry as well as being a visualising reagent used in enzyme-linked immunosorbent assays (ELISA).
Coelenterazine is the luciferin, the light-emitting molecule, used for monitoring reporter genes in BRET, ELISA and HTS techniques.
Fluorescein is a synthetic organic compound and dye.
SBI-0640756 is a first-in-class inhibitor that targets eIF4G1 and disrupts the eIF4F complex.
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